Heel concaving machine



June 20, 1933. M w HOWARD 1,914,568

HEEL CONCAVING MACHINE Filed March 28, 1951. 3 Sheets-Sheet l June 20, 1933. M. w. HOWARD 1,914,558

HEEL CONCAVING MACHINE Filed March 28, 1931 3 Sheets-Sheet 2 June 20, 1933 w. w. HOWARD 3 7 HEEL CONCAVING' MACHINE Filed March 28, 1951, s Sheets-Sheet s e/ fforngys.

Patented June 20, 1933 UNTED 'TATES antics IVIEBTON V7. HOWARD, OF LYNN, MASSACHUSETTS, ASSIG-NQR TO POPE MACHINERY CORPORATION, OF HAVERHELL, MASSACHUSETTS, A CORPORATION OF MAS$ACJEIU- SETTS HEEL CONCAVING MACHINE Application filed March 28, 1931.

This invention relates to machines for concaving the seat of wood heels and particularly to machines of the type described in a copending application of Walter C. Brooks and John W. Staples, Serial No. 379,918, filed Uctober 7, 1929. In general the machine described in the above mentioned application comprises a stationary support having a slot through which projects a rotating cutter. A heel guide is carried upon the support and extends over the slot adjacent the edge of the cutter to engage the edge of the seat of a heel while it is being moved over the cutter. A heavy arm is pivotally mounted upon the machine and is provided with twospaced surfaces, substantially parallel to the support, between which slides a cam having a portion which corresponds substantially with the edge contour formed by the back and sides of the heel seat. This cam carries a jack which holds a wood heel. The cam is rotated while being guided to cause the heel held by the jack to move in engagement with the cutter along a path substantially parallel to the edge contour of the heel seat. A re silient pressure acts upon the pivoted arm to maintain the edge of the seat of the heel in engagement with the heel glide while the heel is engaging the cutter.

Considerable difficulty has been experienced in the past in concaving heels upon machines of this type due to the formation of an objectionable burr upon the edge of the heel seat extending up or down therefrom. It has been attempted, heretofore, to overcome this difficulty byvarying the shape and angle of inclination of the operative face of the heel guide. This difficulty was most effectively minimized by inclining the operative face of the guide toward the heel. However, with the use of this expedient a new trouble arose due to the downward thrust of the guide tending to bend and fracture the tender cross grained marginal edge at the back of the heel seat downward into the cutter slot. This difficulty was partially overcome by carefully controlling the pressure urging the edge of the heel the heel guide and the accurate adjustment of the heel in itshold ing mechanism. This required the services of a Serial No. 5556,089.

highly skilled operator and consumed a great deal of time.

It is the object of the present invention to overcome this difficult 1 by certain provisions which make such time consuming adjustments unnecessary.

It is a further object of the invention to provide means which is adapted to cooperate with the heel guide in a heel concaving machine which prevents damaging of the edge of the heel seat while being concaved.

It is a still further obj ect of the invention to provide an improved form of guide for use in heel concaving machines which is adapted to mold the edge of the heel seat during the concaving operation and remove all burrs and rough edges therefrom.

Before explaining in detail the present in vention, it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings, since the invention is capable of other embodiments and of being practiced or carried out in various ways. Also it is to be understood that the phraseolog or terminology employed herein is for the purpose of description and not of limitation, and it is not intended to limt the invention beyond the terms of the several claims hereto appended as considered in view of the prior art and the requirements thereof.

The invention will be more clearly understood from the following description in 0011- junction with the accompanying drawings in which,

Fig. 1 is a side elevational View of a heel concaving machine embodying the invention;

Fig. 2 is a front elevational view of the same;

Fig. 3 is a sectional view taken upon the line 33 of Fig. 2;

Fig. 4 is a detai sectional view of a portion of the machine;

Fig. 5 is a ragmentary plan view of a portion of the machine;

Fig. 6 is a sectional view taken upon the line 66 of Fig. 5;

Fig. 7 is an enlarged sectional View of a portion of the machine;

Fig. 8 is an elevational View of a heel before belng concaved; and

Fig. 9 is a detail perspective view of the improved heel guide of the invention.

ing a stationary support 11.

' rotatablymounted in suitable bearings 16 carried by the beam between the pivot 13 and the stop 15 and carries a cutter 17 which projects through an elongated slot 18 in the support 11. A heel guide 9 is adj ustably mounted upon the support 11 in any suitable manner so that its edge projects over the end of the slot 18 and terminates adjacent the edge of the cutter 17. The arrangement is such that the cutter is rotated away from the guide in the direction 15 indicated by the arrow in Fig. 7. The shaft 19 is driven directly from the motor by a belt 20. A shaft 21. rotatably mounted in bearings in the frame 10 is driven from the motor 14 through suitable driving connections generally indicated at 22 and may be operatively connected with a shaft 23 by a clutch 24. A worm 25 on the shaft 23 engages a worm wheel (not shown) carried by a shaft 26 rotatably mounted in a stationary sleeve 27. A pulley 28 is secured upon the shaft 26.

An arm 30 is pivotally mounted on the sleeve 2-7 and is provided with spaced shelves 31 and 32 between which a cam 33 is slidably mounted. The cam 33 is formed with a body portion 3a and a continuous wall 35. Teeth are provided near the bottom of the outer surface of the wall 35 and are adapted to engage a pinion 37 carried by a shaft 38 rotatably mounted on the arm 30 and which also carries a pulley 39 connected by a belt 10 with the pulley 28. A guide roll 41 is rotatably mounted on the arm 30 to engage the upper outer surface of the wall 35. The cam 33 is held in engagement with the pinion 37 and guide 41 by a roll engaging the inner surface of the wall 35 and pivotal-l mounted on one end of an arm 43. The arm 43 is pivotally mounted at an intermediate point upon the arm 30 and is connected at its other end to one end of a spring .24;, the other end of which is suitably secured to the arm 30. A jack is adjustably mounted upon a bolt 51 depending from the body portion 34 of the cam 33 and is provided with adjustable clamping jaws 52 adapted to clamp against a heel W and hold the same against the surface of the support 11 as more fully described in the above mentioned copending application.

The port-ion 55 of the cam 33 is shaped to correspond substantially to the edge contour of the seat of the heel W so that when the cam 33 is actuated by the pinion 37, the heel lV will be moved to bring it in engagement with the cutter 17 along a path substantially parallel to the edge contour of the heel seat. During this movement, the edge of the heel is pressed against the guide 9 by the action of a spring 56 one end of which is secured to the arm '30 and the other end of which is secured to a stationary arm 57. The remaining portion 58 of the cam 33 is shaped so that after the heel has been concaved it is returned quickly to its initial position through a path out of the range of the cutter.

In accordance with the present invention, the heel being concaved is guided laterally while being moved in engagement with the cutter. A support is provided between the cutter and the means for guiding the heel laterally for supporting the marginal surface surrounding the portion of the heel engaged by the cutter. This may be accomplished by providing a lip 60 on the guide 9 projecting from the bottom edge toward the cutter. In the embodiment illustrated the guide '9 comprises a main body portion 9a and a portion suitably secured thereto, as by screws 8, and extending therefrom toward the cutter 17 to provide the lip 60 and a guide face 62. The guide face 62 formed by the member 96 serves to guide the heel laterally while the lip 60 supports that portion of the marginal surface surrounding the portion of the heel engaged by the cutter which is between the face 62 and the cutter. Preferably, the face 62 is inclined toward the heel to provide a crotch between the lip 60 and face 62 into which the edge of the heel seat is forced and molded while being concaved.

The present invention permits pressing the edge of the heel seat against the face of the heel guide with considerable force. Consequently, it makes little or no difference what size of heel is being concaved or whether the heel is accurately centered in the mechanism which holds and moves it over the cutter because the burden of positioning the heel so as to obtain a uniform margin around the heel seat is handled by the heel guide. The adjustment of the clamping jaws 52 to take hold of the heel is the only adjustment. now necessary in setting over. The support between the heel guide and cutter for the marginal surface of the heel seat provided by the lip 60 of the guide 9 makes possible the above mentioned advantages and prevents fracturing or splitting of the margin surrounding the heel seat. It also cooperates with the operative face of the heel guide to mold the edge of the heel seat and remove the sharp edge therefrom.

What I claim is:

1. In a machine for concaving heels, in

combination, a cutter, guide means, means between the cutter and the guide means for sup porting the marginal surface surrounding the portion of the heel engaged by the cutter, and means for preventing movement of the heel away from said supporting means and for pressing against said guide means the edge of said surface, and means for moving said heel over said supporting means and relative to said guide means.

2. In a machine for concaving heels, in combination, a cutter, guide means, means between the cutter and the guide means for supporting the marginal surface surrounding the portion of the heel engaged by the cutter, and means for preventing movement of the heel away from said supporting means and for pressing against said guide means the edge of said surface, said supporting means intersecting said guide means to provide a crotch between the same into which the edge of the heel seat is forced.

3. In a machine for concaving heels, in combination, a cutter, guide means, means between the cutter and the guide means for supporting the marginal surface surrounding the portion of the heel engaged by the cutter, and means for preventing movement of the heel away from said supporting means and for pressing against said guide means th edge of said surface, the face of the guide means engaging said heel being inclined toward the heel to provide a crotch between the same and said supporting means into which the edge of the heel seat is forced.

4. In a machine for concaving heels having a cutter, guide means positioned adjacent the edge of the cutter, and means for holding the heel to keep the edge of its seat against the guide means while moving the heel to bring it in engagement with the cutter along a path parallel to the edge contour formed by the back and sides of the heel seat, the combina tion therewith of means between said guide means and cutter for supporting the marginal surface surrounding the portion of the heel engaged by the cutter.

5. In a machine for concaving heels hav ing a cutter, guide means positioned adjacent the cutter, and means for holding said heel against said cutter and guide means while moving said heel in engagement with the cutter along a path parallel to the edge contour formed by the back and sides of the heel seat, the combination therewith of means be tween the cutter and guide means for supporting the marginal surface surrounding the portion of the heel engaged by the cutter.

6. In a machine for concaving heels, in combination, a cutter, guide means positioned adjacent the edge of the cutter, means between said guide means and cutter for supporting the marginal surface surrounding the portion of the heel engaged by the cutter, means for preventing movement of the heel extending from the guide means and adapted to engage said surface, and means for holding the heel against said projection and for pressing the edge of said surface against said face. 1

8. In a machine for concaving heels, in combination, a cutter, guide means having a face adapted to engage the edge of the surface of the heel engaged by the cutter, a projection extending from the guide means and adapted to engage said surface, and means for holding the heel against said projection and for pressing the edge of said surface against said face, the face of said guide extending upward from said projection and inclining toward the heel to provide a crotch to receive said edge of the heel.

9. In a machine for concaving heels, in combination, a cutter, a heel seat edge mould ing guide, means for preventing movement of the heel away from said guide, and for pressing into said guide the edge of the seat of said heel.

In testimony whereof I affix my signature.

MEPJTON W. HOWARD. 

